Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ff8e68897ad85ca8ed52c5dab8eab76ced541b934e32fd109199449cd30a151' 
  AND token = 'pZuC5sk2LMH3SaQhwipH4oFoZHhpDQLRys2StqQ7N7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}